Immune System Vaccines are like a mild type of a disease is given to you or your pet and whilst you may feel ill for a day or two it will make you immune to that same disease but it can only be certain diseases.
acquired immunity
To acquire immunity against fatal diseases.
Active immunity to a disease is acquired either through getting the disease or being vaccinated for it.
Herd vaccination refers to when the majority of a population or commumity are vaccinated that it creates immunity against a specific disease that they were vaccinated for. It creates some safety for the nonvaccinated individuals since the majority of the group have developed immunity and are protected from contracting and spreading the disease to others.
It is possible but rare to get measles after being vaccinated as a child. The measles vaccine is highly effective, but no vaccine is 100% perfect. In some cases, the immunity provided by the vaccine may wane over time or the vaccine may not have conferred full immunity.
If most of the population is vaccinated for a disease and some are not, there is a good chance that those not vaccinated will not come across a person with the disease. This is called "herd" immunity.
They either are vaccinated against those diseases, or they have them and build a natural immunity.
Herd immunity can be safe when a sufficient percentage of the population is vaccinated, reducing the spread of infectious diseases and protecting those who cannot be vaccinated. However, achieving herd immunity through natural infection can be dangerous, as it may lead to severe illness and death, especially among vulnerable populations. Vaccination is the safest and most effective way to establish herd immunity and prevent outbreaks. Overall, the safety of herd immunity largely depends on the methods used to achieve it.
By catching the disease and recovering.
No they need thier shots cuz they can catch things real easy
In order to show positive immunity your blood level must reach a level of 1.10 If it's 90 then you have no immunity and should be vaccinated. If you are between say 1.00 to 1.09 then you some immunity but should have a booster of either measles (mmr) or varicella.
No they need thier shots cuz they can catch things real easy